#include<stdio.h>
#include<string.h>
#include<windows.h>
#include<stdlib.h>
int main()
{
    char arr1[]={"Welcome to China"};
    char arr2[]={"                "};
    int left = 0;
    int right = strlen(arr1)-1;
while(left<=right)
    {
    arr2[left] = arr1[left];
    arr2[right] = arr1[right];
    left++;
    right--;
    Sleep(30);
    system("cls");
    printf("%s\n",arr2);
    }
return 0;
}